1.25x9x0.8的简便方法

2024-12-29 14:06:47
推荐回答(5个)
回答1:

1.25×9×0.8=
1.25×0.8×9=
(1×0.8+0.25×2×0.4)×9=
(0.8+0.2)×9=9

回答2:

1.25x9x0.8
=1.25×0.8×9
=9

回答3:

1.25×9×0.8
=1.25×0.8×9
=1×9
=9

回答4:

1.25×0.8=1
1×9=9

回答5:

原式
=1.25x0.8x9
=1x9
=9